/* css/04-document.css —— 文档体系与练习版式：纸面 / 边栏刻度 / 文档构成
 * 拆分自 public/index.html 单文件版（第 4/5 段，保持原始顺序）。
 * 本项目的 CSS 为多轮迭代叠加：后引入的文件覆盖先前的同名规则，
 * 修改样式请优先在本段内追加；不要调整 index.html 中的引入顺序。
 * 本段包含的迭代：
 *   - Broad learning workspace, precise marginal instruments.
 *   - The active study task leads; the reading margin stays quiet.
 *   - Typography, a single ink surface, and a restrained document system.
 */
/* Broad learning workspace, precise marginal instruments. */
.overview-v7 .desk-grid{grid-template-columns:minmax(0,2.116279fr) minmax(0,1fr);gap:48px}
.overview-v7 .opening-task h2{font-size:42px;line-height:1.3;margin-top:10px}
.overview-v7 .opening-evidence{margin-top:16px;gap:38px}
.overview-v7 .opening-task>.button{display:flex;justify-content:space-between;width:100%;height:48px;margin-top:23px;padding:0 20px;background:#293b2d;font-size:15px;box-shadow:inset 0 1px 0 #ffffff12,0 1px 0 #1f2f23}
.overview-v7 .opening-task>.button:hover{background:#344e3a}
.overview-v7 .chapter-register{margin-top:30px}
.overview-v7 .chapter-index{margin-top:16px;column-gap:30px}
.overview-v7 .study-chapter{padding:16px 0 18px}
.overview-v7 .chapter-caption strong{font-size:18px;line-height:26px}
.chapter-outcome{margin-left:auto;white-space:nowrap;font-size:13px;line-height:22px;color:#65715d}
.chapter-outcome b{font-size:14px;font-weight:400;color:#435943}
.overview-v7 .chapter-caption .icon{width:14px;height:14px}
.overview-v7 .chapter-facts{display:block;font-size:14px;line-height:22px;color:#586a50;margin-top:7px}
.overview-v7 .chapter-facts b{font-size:14px;font-weight:400;color:#40543e}
.coverage-separator{margin:0 4px;color:#86917c}
.overview-v7 .chapter-index .track{height:4px;margin-top:10px;max-width:none}
.overview-v7 .exam-shortcut{margin-top:20px;padding-top:0}
.overview-v7 .footer-note{margin-top:22px}
.overview-v7 .analysis-rail{background:none;padding:0;color:#293b2d;border-radius:0}
.overview-v7 .analysis-rail .summary-metrics{margin:0;padding:0;border:0;gap:10px 22px}
.overview-v7 .analysis-rail .summary-scope{font-size:14px;font-weight:500;color:#475d42}
.overview-v7 .analysis-rail .summary-stat>div>span,.overview-v7 .analysis-rail .summary-stat .mistake-entry>span{font-size:14px;line-height:22px;color:#56684d}
.overview-v7 .analysis-rail .summary-stat.coverage-stat strong,.overview-v7 .analysis-rail .summary-stat .mistake-entry strong{font-size:26px;line-height:34px;color:#415c3d}
.overview-v7 .analysis-rail .summary-stat .mistake-entry{color:#52674a}
.overview-v7 .analysis-rail .summary-stat p{font-size:14px;line-height:22px;color:#63715a;margin-top:5px}
.overview-v7 .analysis-rail .trend-panel,.overview-v7 .analysis-rail .rhythm-panel{margin-top:24px;padding-top:24px;border-top:1px solid #d6ddce;border-radius:0}
.overview-v7 .analysis-rail .panel-title{font-size:16px;line-height:24px;font-weight:550;color:#354c35}
.overview-v7 .analysis-rail .segmented{background:#eceee3;border:0}
.overview-v7 .analysis-rail .segmented button{font-size:14px;line-height:22px;padding:3px 7px;color:#65735c}
.overview-v7 .analysis-rail .segmented button.active{background:#fafbf4;color:#365c3e;box-shadow:none}
.overview-v7 .analysis-rail .chart-readout{justify-content:flex-start;gap:23px;margin-top:11px;font-size:14px;line-height:22px;color:#63735b}
.chart-summary>span{display:inline-flex;align-items:center;gap:5px;white-space:nowrap}
.chart-summary strong{font-size:14px;font-weight:500;color:#3e5b3e}
.chart-summary .mean-key{display:inline-block;width:13px;border-color:#819075}
.overview-v7 .analysis-rail .chart{width:100%;height:auto;margin:9px 0 0}
.overview-v7 .analysis-rail .chart .axis-value,.overview-v7 .analysis-rail .chart .axis-date{font-size:14px;fill:#5b6b53;font-weight:400}
.overview-v7 .analysis-rail .chart .chart-rule{stroke:#cbd4c2;opacity:.6}
.overview-v7 .analysis-rail .chart .mean-rule{stroke:#829776;opacity:.9}
.overview-v7 .analysis-rail .chart .trend-line{stroke:#527358}
.overview-v7 .analysis-rail .chart .latest-point{fill:#365e4c;stroke:#f4f2eb}
.overview-v7 .analysis-rail .rhythm-meta{display:flex;justify-content:space-between;gap:14px;font-size:14px;line-height:22px;color:#5a6c51;margin-top:10px}
.overview-v7 .rhythm-meta b{font-weight:500}
.overview-v7 .analysis-rail .rhythm-content{display:block;margin-top:13px}
.overview-v7 .analysis-rail .rhythm-side{display:none}
.overview-v7 .analysis-rail .calendar-labels,.overview-v7 .analysis-rail .calendar-week{grid-template-columns:43px repeat(7,28px);gap:4px;width:267px}
.overview-v7 .analysis-rail .calendar-labels,.overview-v7 .analysis-rail .calendar-week time{font-size:14px;line-height:22px;color:#596c50}
.overview-v7 .analysis-rail .heat-cell{width:28px;height:28px;border:0;border-radius:1px}
.overview-v7 .analysis-rail .heat-cell.is-empty{border:1px solid #8ca18d}
.overview-v7 .analysis-rail .heat-cell.today:after{background:#29332b}
.overview-v7 .analysis-rail .heat-key{font-size:14px;line-height:22px;gap:9px;color:#4a5e44;margin-top:12px}
.overview-v7 .analysis-rail .heat-key>span:first-child i{border-color:#8ca18d}
.session-label{font-size:14px;line-height:22px;letter-spacing:0}
.session-entry{min-height:36px;font-size:14px;line-height:22px}
.reading-night .session-entry{color:#bbc3ae}
.reading-night .session-label,.reading-night .session-pagecount>span{color:#bbc3ae}
.practice-spread .question-actions{margin-top:24px}
.practice-spread .question-actions .button{width:152px;min-width:152px;height:48px;padding:0 18px;font-size:14px;display:flex;justify-content:space-between}
.practice-spread .question-actions .quiz-tools .keyboard-note,.practice-spread .question-actions .quiz-tools .keyboard-note kbd{font-size:14px;line-height:22px}
.reading-night .practice-spread .question-actions .quiz-tools .keyboard-note,.reading-night .practice-spread .question-actions .quiz-tools .keyboard-note kbd{color:#bbc3ae}
.reading-night .practice-spread .options .option.selected{background:#313b2f;box-shadow:inset 2px 0 0 #bfd2ab}
@media(max-width:1100px){.overview-v7 .desk-grid{gap:36px}.overview-v7 .chapter-caption strong{font-size:17px}.chapter-outcome{font-size:12px}.overview-v7 .opening-task h2{font-size:38px}}
@media(max-width:1000px){.overview-v7 .desk-grid{grid-template-columns:1fr;gap:34px}.overview-v7 .chapter-index{grid-template-columns:repeat(2,minmax(0,1fr))}.overview-v7 .analysis-rail{max-width:640px}}
@media(max-width:760px){.overview-v7 .chapter-index{grid-template-columns:1fr}.overview-v7 .opening-task h2{font-size:36px}.overview-v7 .chapter-caption strong{font-size:17px}.chapter-outcome{font-size:13px}.overview-v7 .study-chapter{padding:15px 0}.overview-v7 .analysis-rail{max-width:none}.session-entry{min-height:44px}}
/* The active study task leads; the reading margin stays quiet. */
.overview-v7 .opening-task h2{font-size:50px;line-height:1.25;margin-top:8px}
.overview-v7 .opening-evidence{margin-top:12px}
.overview-v7 .opening-evidence strong{font-size:32px;line-height:40px}
.overview-v7 .opening-task>.button{width:400px;max-width:100%;height:52px;margin-top:16px}
.overview-v7 .chapter-register{margin-top:24px}
.overview-v7 .analysis-rail .summary-stat.coverage-stat strong,.overview-v7 .analysis-rail .summary-stat .mistake-entry strong{font-size:24px;line-height:34px}
.overview-v7 .study-chapter{padding:10px 0 12px}
.overview-v7 .chapter-caption strong{font-size:20px;line-height:28px}
.overview-v7 .chapter-facts{margin-top:6px;line-height:22px}
.overview-v7 .chapter-index .track{height:2px;margin-top:9px}
.overview-v7 .chapter-index .track>span{background:#97a68d}
.overview-v7 .study-chapter.is-priority .track>span{background:#4e7156}
.overview-v7 .analysis-rail .chart .trend-line{stroke-width:2px}
.overview-v7 .analysis-rail .chart .latest-caption{font-size:14px;fill:#456642;font-weight:500}
.overview-v7 .analysis-rail .heat-cell.today:after{display:none}
.overview-v7 .analysis-rail .heat-cell.today{box-shadow:inset 0 0 0 1px #365e4c}
body.practice-mode .content{max-width:880px}
.practice-spread{grid-template-columns:100px minmax(0,1fr);gap:40px}
.session-margin{padding-right:20px}
.session-pagecount strong{font-size:32px;line-height:40px;letter-spacing:-.5px}
.session-pagecount{gap:5px}
.session-answers{gap:0;margin-top:24px}
.session-entry{padding-right:0;min-height:36px}
.session-entry.current{border-right:0}
.session-entry.current>.num{display:grid;place-items:center;width:36px;height:36px;background:#365e4c;color:#fffdf7;font-size:14px;line-height:20px;border-radius:2px}
.entry-state{min-width:20px}
.entry-state .icon{width:16px;height:16px;stroke-width:2.5}
.reading-night .session-entry.current>.num{background:#bfd2ab;color:#263921}
.reading-night .session-entry.is-correct .entry-state{color:#c6d8b8}
.reading-night .session-entry.is-wrong .entry-state{color:#e9c5a5}
.reading-night .practice-spread .options .option.selected{background:#434d41;box-shadow:inset 2px 0 0 #bfd2ab}
@media(max-width:1100px){.overview-v7 .opening-task h2{font-size:44px}.overview-v7 .chapter-caption strong{font-size:18px}}
@media(max-width:1000px){.practice-spread{grid-template-columns:100px minmax(0,1fr);gap:32px}}
@media(max-width:760px){.overview-v7 .opening-task h2{font-size:38px}.overview-v7 .chapter-caption strong{font-size:18px}.practice-spread{grid-template-columns:1fr;gap:26px}.session-margin{padding:0;grid-template-columns:72px minmax(0,1fr)}.session-pagecount strong{font-size:32px;line-height:40px}.session-entry{min-height:44px}.session-entry.current>.num{width:32px;height:32px}.entry-state .icon{width:12px;height:12px}}
@media(prefers-reduced-motion:reduce){.paper-page.page-turn{animation:none}}

/* Typography, a single ink surface, and a restrained document system. */
:root{--bg:#f5f3ed;--paper:#faf8f2;--ink:#272623;--muted:#767572;--line:#dddcd9;--green:#282724;--soft:#eae9e6;--faint:#f4f3f0;--red:#a64e36;--radius:3px}
body{background:#f5f3ed;color:#272623}
.topbar{background:#f5f3ed;border-color:#deddda;height:76px}
.workspace-brand{color:#272623}.workspace-brand span{color:#797875}
.workspace-nav button{color:#767572}.workspace-nav button.active{color:#252421;border-color:#2a2926}
.topbar .avatar{background:#e9e8e5;color:#565552}.search-button{background:none;color:#6a6966;border-color:#deddda;border-radius:3px}
.button{border-radius:3px;background:#282724;box-shadow:none}.button:hover{background:#3c3b38}.button.secondary{background:#faf8f2;border-color:#d7d6d3;color:#494845;box-shadow:none}.button.secondary:hover{background:#e9e8e5}.text-button{color:#686764}
.content{max-width:1236px;padding:26px 48px 28px}
.overview-v8{animation:none}.overview-v8 .overview-heading{margin-bottom:24px}.overview-v8 .overview-heading h1{font-size:16px;color:#272623}.overview-v8 .overview-heading p,.overview-v8 .date{font-size:14px;color:#797875}.overview-v8 .heading-divider{color:#c2c1be}.overview-v8 .heading-actions .button{height:40px;font-size:14px}
.learning-cover{min-height:238px;display:grid;grid-template-columns:1fr 270px;align-items:center;padding:30px 38px;background:#282724;color:#f1f0e8;animation:cover-enter .5s cubic-bezier(.2,.7,.2,1) both}
.cover-label{font-size:14px;line-height:22px;color:#bab9b6}.cover-task h2{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:62px;font-weight:500;line-height:1.25;letter-spacing:-1.2px;margin-top:12px;color:#f1f0e8}
.cover-baseline{display:flex;align-items:center;gap:25px;margin-top:24px}.cover-baseline>.button{height:46px;width:166px;padding:0 18px;justify-content:space-between;background:#eeede2;color:#272623;font-size:15px;box-shadow:inset 0 1px 0 #fff4,0 2px 0 #181714}.cover-baseline>.button:hover{background:#fffdf4;transform:translateY(-1px)}.cover-baseline>span{font-size:14px;color:#b6b5b2}.cover-baseline b{font-weight:400;color:#dbdad7;margin-left:5px}
.cover-number{display:flex;flex-direction:column;align-items:flex-end;padding-right:10px}.cover-number strong{font-family:Georgia,"Times New Roman",serif;font-size:132px;line-height:.94;font-weight:400;letter-spacing:-5px;color:#e9e9dd}.cover-number>span{font-size:14px;color:#bcbbb8;margin-top:16px;padding-right:7px}
.review-desk{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:56px;margin-top:28px}.overview-v8 .chapter-register{margin:0}.overview-v8 .chapter-register>.between h2,.overview-v8 .panel-title{font-size:17px;font-weight:550;line-height:24px;color:#2d2c29}.overview-v8 .text-button{font-size:14px;line-height:20px}.overview-v8 .chapter-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:26px;margin-top:12px}
.overview-v8 .study-chapter{padding:15px 0 14px;border-color:#dfdedb;color:#272623}.overview-v8 .study-chapter:hover{background:transparent}.overview-v8 .study-chapter:hover .chapter-caption strong{color:#a64e36}.overview-v8 .chapter-caption{gap:10px;align-items:center}.overview-v8 .chapter-caption strong{font-size:18px;line-height:26px;letter-spacing:-.25px;font-weight:400;color:#3a3936}.overview-v8 .study-chapter.is-priority .chapter-caption strong{font-weight:550;color:#272623}.overview-v8 .chapter-caption>.icon{width:14px;height:14px;color:#a1a09d}.overview-v8 .chapter-outcome{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:1px;white-space:nowrap;font-size:14px;line-height:18px;color:#696865}.overview-v8 .chapter-outcome b{font-size:15px;font-weight:400}.overview-v8 .chapter-outcome>span{font-size:11px;color:#959491}
.overview-v8 .chapter-facts{display:block;margin-top:8px;font-size:13px;line-height:20px;color:#868582}.overview-v8 .chapter-facts b{font-size:13px;font-weight:400;color:#706f6c}.overview-v8 .coverage-separator{color:#b4b3b0;padding:0 3px}.overview-v8 .chapter-index .track{height:2px;margin-top:12px;background:#e1e0dd;max-width:none;border-radius:0}.overview-v8 .chapter-index .track>span{background:#a5a4a1;border-radius:0}.overview-v8 .study-chapter.is-priority .track>span{background:#797875}
.bank-strip{display:grid;grid-template-columns:1fr 1fr 1.03fr;gap:20px;padding-top:23px;margin-top:20px;border-top:1px solid #cfcecb}.bank-strip>div,.bank-strip>button{text-align:left;min-width:0;padding:0}.bank-strip span{font-size:12px;line-height:18px;color:#7c7b78}.bank-strip strong{display:block;font-size:28px;font-weight:400;line-height:36px;margin-top:4px;color:#555451}.bank-strip strong small{font-size:13px;margin-left:3px;color:#82817e}.bank-strip p{font-size:12px;line-height:18px;color:#888784;margin-top:4px}.bank-strip>button>span{display:flex;gap:5px;align-items:center}.bank-strip .icon{width:14px;height:14px}.bank-strip>button:hover strong{color:#a64e36}.bank-strip .exam-entry{display:flex;align-items:center;gap:10px;align-self:center}.bank-strip .exam-entry>span{display:flex;flex-direction:column;align-items:flex-start;font-size:14px;gap:5px;color:#53524f}.bank-strip .exam-entry small{font-size:12px;color:#888784}.bank-strip .exam-entry>.icon:last-child{margin-left:auto}
.overview-v8 .analysis-rail{background:none;padding:0;border:0;border-radius:0;color:#2c2b28}.overview-v8 .trend-panel{height:auto;margin:0;padding:0;background:none;border:0}.overview-v8 .panel-head{padding:0;align-items:center}.overview-v8 .segmented{background:none;gap:10px;padding:0;border-radius:0}.overview-v8 .segmented button{padding:3px 0;border-radius:0;color:#979693;font-size:14px;line-height:22px}.overview-v8 .segmented button.active{background:none;box-shadow:inset 0 -1px 0 #31302d;color:#31302d;font-weight:500}
.overview-v8 .chart-summary{display:flex;justify-content:space-between;align-items:flex-end;margin-top:10px}.overview-v8 .chart-summary>span:first-child{display:flex;gap:9px;align-items:baseline}.overview-v8 #trend-latest{font-family:Georgia,"Times New Roman",serif;font-size:34px;line-height:40px;font-weight:400;letter-spacing:-.8px;color:#3b3a37}.overview-v8 #trend-latest small{font:14px Inter,Arial,sans-serif;margin-left:2px}.overview-v8 .chart-summary>span:first-child>span,.overview-v8 .mean-label{font-size:12px;line-height:20px;color:#888784}.overview-v8 .mean-label{display:flex;align-items:center;gap:6px;padding-bottom:4px}.mean-key{display:inline-block;width:15px;height:1px;border-top:1px dashed #a6a5a2}.overview-v8 .mean-label b{font-weight:400;color:#666562}
.overview-v8 .chart{width:100%;height:auto;margin:7px 0 0;position:relative}.overview-v8 .chart svg{width:100%;height:auto;display:block}.overview-v8 .chart .trend-line{stroke:#6b6a67;stroke-width:2;fill:none}.overview-v8 .chart text{font-size:12px;fill:#91908d}.overview-v8 .chart .axis-value{font-size:12px}.overview-v8 .chart .chart-rule{stroke:#e7e6e3}.overview-v8 .chart .mean-rule{stroke:#aeadaa}.overview-v8 .chart .latest-point{fill:#a64e36;stroke:#f5f3ed;stroke-width:2}.overview-v8 .chart-tip{background:#363532;border-radius:3px}.overview-v8 .chart-note{display:none}
.overview-v8 .rhythm-panel{background:none;border:0;border-top:1px solid #dad9d6;border-radius:0;padding:16px 0 0;margin-top:14px}.rhythm-heading{display:flex;justify-content:space-between;align-items:center;gap:16px}.rhythm-heading>span{font-size:12px;line-height:22px;color:#898885}.rhythm-heading b{font-weight:500;color:#63625f}.overview-v8 .study-calendar{margin-top:12px;display:block}.overview-v8 .calendar-labels,.overview-v8 .calendar-week{display:grid;grid-template-columns:43px repeat(7,28px);column-gap:4px;align-items:center}.overview-v8 .calendar-labels{font-size:12px;line-height:18px;color:#949390}.overview-v8 .calendar-labels>span{text-align:center}.overview-v8 .calendar-weeks{display:flex;flex-direction:column;gap:4px;margin-top:6px}.overview-v8 .calendar-week time{font-size:12px;line-height:18px;color:#93928f}.overview-v8 .heat-cell{width:28px;height:28px;aspect-ratio:1;border:0;border-radius:0;outline:none;box-shadow:none;transform:none}.overview-v8 .heat-cell.is-empty{border:1px solid #b8b7b4}.overview-v8 .heat-cell.today{box-shadow:inset 0 0 0 1px #a64e36}.overview-v8 .heat-cell.today:after{display:none}.overview-v8 .heat-cell:hover,.overview-v8 .heat-cell:focus-visible{outline:1px solid #a64e36;outline-offset:2px;transform:none}.overview-v8 .heat-key{display:flex;gap:10px;font-size:11px;line-height:18px;color:#959491;margin-top:9px}.overview-v8 .heat-key i{width:10px;height:10px;border-radius:0}.overview-v8 .heat-key>span:first-child i{border:1px solid #b8b7b4}
.overview-v8 .footer-note{margin-top:22px;font-size:12px;line-height:20px;color:#979693}
body.practice-mode{background:#e9e8df}body.practice-mode .topbar{background:#e9e8df;border:0;height:66px;padding:0 38px}body.practice-mode .focus-back,body.practice-mode .focus-course{color:#787774;font-size:13px}body.practice-mode .demo-label{color:#91908d;font-size:12px}.focus-actions{gap:18px}.reading-mode{background:#f1f0ed;border-color:#d0cfcc;color:#5c5b58;border-radius:3px;box-shadow:0 1px 0 #cdccc9}.lamp-dot{background:#bab9b6;border-color:#aeadaa;box-shadow:none}
body.practice-mode .content{max-width:936px;width:calc(100% - 72px);margin:26px auto 38px;padding:0;background:none;border:0;box-shadow:none;background-image:none}
.practice-v8{border:1px solid #d6d5d2;background:#faf8f2;border-radius:2px;box-shadow:0 2px 0 #dddcd9}.practice-document{padding:28px 46px 22px}.document-head{display:flex;justify-content:space-between;align-items:center;gap:28px}.document-label{display:block;font-size:12px;line-height:20px;color:#9a9996;letter-spacing:.02em}.document-topic>strong{display:block;margin-top:7px;font-size:16px;font-weight:450;color:#6b6a67}.document-count{display:flex;align-items:baseline;gap:9px}.document-count>strong{font-family:Georgia,"Times New Roman",serif;font-size:64px;font-weight:400;line-height:74px;color:#858481;letter-spacing:-2px}.document-count>span{font-size:13px;color:#a5a4a1}.practice-v8 .question-panel{padding:0;border:0;background:none;min-height:0}.practice-v8 .question-title{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-size:28px;font-weight:500;line-height:1.7;letter-spacing:0;margin:21px 0 27px;color:#383734;max-width:none}
.practice-v8 .options{gap:0;border-top:1px solid #e1e0dd;border-bottom:1px solid #e1e0dd}.practice-v8 .options .option{min-height:64px;padding:16px 18px;gap:15px;border:0;border-bottom:1px solid #e1e0dd;border-radius:0;background:none;box-shadow:none}.practice-v8 .options .option:last-child{border-bottom:0}.practice-v8 .option .letter{font-size:14px;line-height:22px;color:#969592;border:0;background:none;width:20px;height:auto}.practice-v8 .option .option-text{font-size:18px;line-height:30px;color:#4e4d4a}.practice-v8 .choice-indicator{width:17px;height:17px;border:1.5px solid #bfbebb;background:none}.practice-v8 .option.selected .choice-indicator{background:#a64e36;border-color:#a64e36}.practice-v8 .option.selected .choice-indicator:after{background:#faf8f2}.practice-v8 .options .option:hover:not(:disabled){background:#f1f0ed}.practice-v8 .options .option.selected{background:#eeede2;box-shadow:inset 2px 0 0 #a64e36}.practice-v8 .options .option.correct{background:#edece9;box-shadow:inset 2px 0 0 #807f7c}.practice-v8 .options .option.incorrect{background:#ebeae7;box-shadow:inset 2px 0 0 #a64e36}.practice-v8 .option .answer-icon{width:17px;height:17px;color:#81807d}.practice-v8 .option.incorrect .answer-icon{color:#a64e36}
.practice-v8 .question-actions{padding:0;border:0;margin-top:24px;gap:20px;align-items:center}.practice-v8 .question-actions .button{height:46px;min-width:150px;font-size:14px;padding:0 18px;justify-content:space-between;background:#4d4c49;border-color:#4d4c49;border-radius:3px;box-shadow:0 2px 0 #d3d2cf}.practice-v8 .keyboard-note,.practice-v8 .keyboard-note kbd{font-size:12px;line-height:20px;color:#92918e}.practice-v8 .keyboard-note{margin:0}.practice-v8 .keyboard-note kbd{border:0;background:none;padding:0;margin:0}.practice-v8 .shortcut-separator{margin:0 9px;color:#bab9b6}
.document-foot{display:flex;align-items:center;gap:22px;margin-top:28px;padding-top:15px;border-top:1px solid #dfdedb}.answered-count{font-size:12px;color:#969592;white-space:nowrap}.answered-count b{font-weight:400;margin-left:5px;color:#757471}.document-answers{display:flex;flex:1 1 auto;min-width:0;flex-wrap:wrap;align-items:flex-start;align-content:flex-start;justify-content:flex-start;gap:10px 4px}.document-entry{width:32px;height:42px;padding:0;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:12px;color:#a1a09d}.document-entry>.num{display:grid;place-items:center;width:28px;height:27px;border-radius:2px}.document-entry.current>.num{background:#a64e36;color:#fff9ef}.document-entry .entry-state{min-width:0;min-height:12px}.document-entry .entry-state .icon{width:12px;height:12px;stroke-width:2}.document-entry.is-correct .entry-state{color:#81807d}.document-entry.is-wrong .entry-state{color:#a64e36}.document-entry:hover>.num{box-shadow:inset 0 0 0 1px #afaeab}.document-foot .fav-toggle{margin-left:auto;color:#989794;font-size:12px;display:flex;align-items:center;gap:6px;white-space:nowrap}.document-foot .fav-toggle.saved{color:#a64e36}
body.practice-mode.reading-night,body.practice-mode.reading-night .topbar{background:#21201d;color:#e4e3e0}.reading-night .focus-back,.reading-night .focus-course{color:#abaaa7}.reading-night .demo-label{color:#92918e}.reading-night .reading-mode{background:#32312e;border-color:#4b4a47;color:#c9c8c5;box-shadow:0 1px 0 #181714}.reading-night .lamp-dot{background:#b9b8b5;border-color:#b9b8b5}
.reading-night .practice-v8{background:#2e2d2a;border-color:#43423f;box-shadow:0 2px 0 #191815}.reading-night .document-label{color:#908f8c}.reading-night .document-topic>strong{color:#bab9b6}.reading-night .document-count>strong{color:#b3b2af}.reading-night .document-count>span{color:#91908d}.reading-night .practice-v8 .question-title{color:#e6e5e2}.reading-night .practice-v8 .options,.reading-night .practice-v8 .options .option{border-color:#504f4c}.reading-night .practice-v8 .option .option-text{color:#e0dfdc}.reading-night .practice-v8 .option .letter{color:#afaeab}.reading-night .practice-v8 .option:not(.selected) .choice-indicator{border-color:#a2a19e;background:none}.reading-night .practice-v8 .options .option:hover:not(:disabled){background:#3c3b38}.reading-night .practice-v8 .options .option.selected{background:#3e3d3a;box-shadow:inset 2px 0 0 #c78b70}.reading-night .practice-v8 .option.selected .choice-indicator{background:#c78b70;border-color:#c78b70}.reading-night .practice-v8 .option.selected .choice-indicator:after{background:#2e2d2a}.reading-night .practice-v8 .options .option.correct{background:#42413e;box-shadow:inset 2px 0 0 #b9b8b5}.reading-night .practice-v8 .options .option.incorrect{background:#3f3e3b;box-shadow:inset 2px 0 0 #c78b70}.reading-night .practice-v8 .option .answer-icon{color:#cccbc8}.reading-night .practice-v8 .option.incorrect .answer-icon{color:#d7a084}.reading-night .practice-v8 .question-actions .button{background:#dbdad7;color:#31302d;border-color:#dbdad7;box-shadow:0 2px 0 #1f1e1b}.reading-night .practice-v8 .question-actions .button:disabled{background:#454441;border-color:#454441;color:#93928f;box-shadow:none}.reading-night .practice-v8 .keyboard-note,.reading-night .practice-v8 .keyboard-note kbd{color:#a3a29f}.reading-night .practice-v8 .shortcut-separator{color:#656461}.reading-night .document-foot{border-color:#4a4946}.reading-night .answered-count{color:#959491}.reading-night .answered-count b{color:#b6b5b2}.reading-night .document-entry{color:#9f9e9b}.reading-night .document-entry.current>.num{background:#c78b70;color:#2a2926}.reading-night .document-entry.is-correct .entry-state{color:#c8c7c4}.reading-night .document-entry.is-wrong .entry-state{color:#d6a084}.reading-night .document-foot .fav-toggle{color:#9f9e9b}.reading-night .document-foot .fav-toggle.saved{color:#d6a084}
@keyframes cover-enter{from{opacity:.65;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:1080px){.content{padding-left:32px;padding-right:32px}.review-desk{gap:32px;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr)}.cover-task h2{font-size:54px}.learning-cover{grid-template-columns:1fr 220px}.cover-number strong{font-size:116px}.overview-v8 .chapter-caption strong{font-size:16px}.overview-v8 .chapter-index{column-gap:20px}.bank-strip{grid-template-columns:1fr 1fr}.bank-strip .exam-entry{grid-column:1/-1}.rhythm-heading{align-items:flex-start;flex-direction:column;gap:4px}.document-foot{gap:16px}}
@media(max-width:820px){.review-desk{grid-template-columns:1fr;gap:28px}.overview-v8 .analysis-rail{display:grid;grid-template-columns:1.3fr 1fr;gap:30px}.overview-v8 .rhythm-panel{border:0;padding:0;margin:0}.bank-strip{grid-template-columns:1fr 1fr 1fr}.bank-strip .exam-entry{grid-column:auto}.document-foot{flex-wrap:wrap}.document-foot .fav-toggle{margin-left:auto}.practice-document{padding:26px 30px 22px}.document-answers{gap:6px 2px}.document-entry{width:28px}}
@media(max-width:600px){.content{padding:20px 20px 90px}.overview-v8 .overview-heading{align-items:flex-start;margin-bottom:20px}.overview-v8 .overview-heading>div:first-child{gap:0;flex-direction:column;align-items:flex-start}.overview-v8 .heading-divider{display:none}.overview-v8 .overview-heading p{margin-top:5px;font-size:12px}.overview-v8 .heading-actions .date{display:none}.learning-cover{padding:25px 24px;min-height:225px;grid-template-columns:1fr 74px;gap:10px}.cover-label{font-size:12px}.cover-task h2{font-size:36px;letter-spacing:-.8px;margin-top:14px}.cover-number{padding:0;align-self:start;margin-top:20px}.cover-number strong{font-size:65px;letter-spacing:-2px}.cover-number>span{font-size:11px;white-space:nowrap;padding:0;margin-top:8px}.cover-baseline{display:block;margin-top:21px}.cover-baseline .button{width:145px;height:43px;font-size:14px}.cover-baseline>span{display:block;font-size:12px;margin-top:15px}.overview-v8 .chapter-index{grid-template-columns:1fr}.overview-v8 .chapter-caption strong{font-size:18px}.bank-strip{grid-template-columns:1fr 1fr}.bank-strip .exam-entry{grid-column:1/-1}.overview-v8 .analysis-rail{display:block}.overview-v8 .rhythm-panel{padding-top:22px;margin-top:22px;border-top:1px solid #dad9d6}.rhythm-heading{flex-direction:row;align-items:center}.overview-v8 .footer-note>span:last-child{display:none}body.practice-mode .topbar{height:60px;padding:0 20px}body.practice-mode .focus-course{display:none}body.practice-mode .demo-label{display:none}body.practice-mode .content{width:calc(100% - 24px);margin:12px auto 28px}.practice-document{padding:23px 20px 19px}.document-count>strong{font-size:48px;line-height:54px}.document-topic>strong{font-size:14px}.document-label{font-size:11px}.practice-v8 .question-title{font-size:23px;line-height:1.75;margin-top:23px}.practice-v8 .options .option{padding:15px 10px;gap:10px}.practice-v8 .option .option-text{font-size:16px;line-height:28px}.practice-v8 .option .letter{width:17px;font-size:12px}.practice-v8 .keyboard-note{display:none}.practice-v8 .question-actions{justify-content:flex-end}.document-foot{gap:10px;margin-top:24px}.answered-count{order:2}.document-foot .fav-toggle{order:3}.document-answers{order:1;flex-basis:100%;justify-content:space-between;gap:6px 0;align-content:flex-start}.document-entry{width:28px;height:38px}}
@media(prefers-reduced-motion:reduce){.learning-cover,.practice-v8.page-turn{animation:none}}


.overview-v8 .learning-cover{min-height:220px;padding:24px 32px}
.overview-v8 .cover-task h2{font-size:58px}
.overview-v8 .cover-number strong{font-size:122px}
.overview-v8 .review-desk{margin-top:26px}
.overview-v8 .study-chapter{padding:12px 0 11px}
.overview-v8 .chapter-caption{min-height:26px}
.overview-v8 .chapter-outcome{flex-direction:row;align-items:baseline;gap:4px;line-height:22px}
.overview-v8 .chapter-outcome>span{font-size:12px;color:#77796e}
.overview-v8 .chapter-facts{margin-top:6px;line-height:20px;color:#717469}
.overview-v8 .chapter-facts b{color:#5f6258}
.overview-v8 .chapter-index .track{margin-top:8px}
.overview-v8 .bank-strip{margin-top:18px;padding-top:18px}
.overview-v8 .bank-strip span,.overview-v8 .bank-strip p{color:#73766a}
.overview-v8 .analysis-rail .chart .axis-value,.overview-v8 .analysis-rail .chart .axis-date{font-size:12px;fill:#74796b}
.overview-v8 .rhythm-panel{display:block;margin-top:12px;padding-top:14px}
.overview-v8 .study-calendar{margin-top:10px}
.overview-v8 .calendar-labels,.overview-v8 .calendar-week{grid-template-columns:43px repeat(7,26px);column-gap:4px}
.overview-v8 .calendar-labels{color:#767d6a}
.overview-v8 .calendar-week time{color:#737c67}
.overview-v8 .calendar-weeks{gap:3px;margin-top:5px}
.overview-v8 .heat-cell{width:26px;height:26px}
.overview-v8 .heat-key{color:#727d65;margin-top:8px}
.overview-v8 .rhythm-heading>span,.overview-v8 .mean-label,.overview-v8 .chart-summary>span:first-child>span{color:#737b66}
.practice-v8 .document-entry{width:36px}.practice-v8 .document-entry>.num{width:32px;height:29px}
.reading-night .practice-v8 .document-label{color:#a7afa0}
.reading-night .practice-v8 .keyboard-note,.reading-night .practice-v8 .keyboard-note kbd{color:#b6bdad}
.reading-night .practice-v8 .document-entry,.reading-night .practice-v8 .answered-count,.reading-night .practice-v8 .document-foot .fav-toggle{color:#aab59c}
.reading-night .practice-v8 .document-entry.is-correct .entry-state{color:#bcc8ae}
.reading-night .practice-v8 .document-entry.is-wrong .entry-state{color:#d6a084}
@media(max-width:1080px){.overview-v8 .cover-task h2{font-size:54px}.overview-v8 .cover-number strong{font-size:116px}.overview-v8 .chapter-outcome>span{display:none}}
@media(max-width:600px){.overview-v8 .learning-cover{padding:25px 24px;min-height:225px}.overview-v8 .cover-task h2{font-size:36px}.overview-v8 .cover-number strong{font-size:65px}.overview-v8 .chapter-outcome>span{display:inline}.practice-v8 .document-entry{width:28px}.practice-v8 .document-entry>.num{width:28px;height:27px}}


.overview-v8 .rhythm-panel{height:auto}